1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/* LzFind.h -- Match finder for LZ algorithms
2009-04-22 : Igor Pavlov : Public domain */
#ifndef __LZ_FIND_H
#define __LZ_FIND_H
#include "Types.h"
typedef uint32_t CLzRef;
struct CMatchFinder
{
uint8_t *buffer;
uint32_t pos;
uint32_t posLimit;
uint32_t streamPos;
uint32_t lenLimit;
uint32_t cyclicBufferPos;
uint32_t cyclicBufferSize; /* it must be = (historySize + 1) */
uint32_t matchMaxLen;
CLzRef *hash;
CLzRef *son;
uint32_t hashMask;
uint32_t cutValue;
uint8_t *bufferBase;
struct ISeqInStream *stream;
int streamEndWasReached;
uint32_t blockSize;
uint32_t keepSizeBefore;
uint32_t keepSizeAfter;
uint32_t numHashBytes;
int directInput;
size_t directInputRem;
int btMode;
int bigHash;
uint32_t historySize;
uint32_t fixedHashSize;
uint32_t hashSizeSum;
uint32_t numSons;
SRes result;
uint32_t crc[256];
};
#define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer)
#define Inline_MatchFinder_GetIndexByte(p, index) ((p)->buffer[(int32_t)(index)])
#define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos)
int MatchFinder_NeedMove(struct CMatchFinder *p);
uint8_t *MatchFinder_GetPointerToCurrentPos(struct CMatchFinder *p);
void MatchFinder_MoveBlock(struct CMatchFinder *p);
void MatchFinder_ReadIfRequired(struct CMatchFinder *p);
void MatchFinder_Construct(struct CMatchFinder *p);
/* Conditions:
historySize <= 3 GB
keepAddBufferBefore + matchMaxLen + keepAddBufferAfter < 511MB
*/
int MatchFinder_Create(struct CMatchFinder *p, uint32_t historySize,
uint32_t keepAddBufferBefore, uint32_t matchMaxLen, uint32_t keepAddBufferAfter,
struct ISzAlloc *alloc);
void MatchFinder_Free(struct CMatchFinder *p, struct ISzAlloc *alloc);
void MatchFinder_Normalize3(uint32_t subValue, CLzRef *items, uint32_t numItems);
void MatchFinder_ReduceOffsets(struct CMatchFinder *p, uint32_t subValue);
uint32_t * GetMatchesSpec1(uint32_t lenLimit, uint32_t curMatch, uint32_t pos, const uint8_t *buffer, CLzRef *son,
uint32_t _cyclicBufferPos, uint32_t _cyclicBufferSize, uint32_t _cutValue,
uint32_t *distances, uint32_t maxLen);
/*
Conditions:
Mf_GetNumAvailableBytes_Func must be called before each Mf_GetMatchLen_Func.
Mf_GetPointerToCurrentPos_Func's result must be used only before any other function
*/
typedef void (*Mf_Init_Func)(void *object);
typedef uint8_t (*Mf_GetIndexByte_Func)(void *object, int32_t index);
typedef uint32_t (*Mf_GetNumAvailableBytes_Func)(void *object);
typedef const uint8_t * (*Mf_GetPointerToCurrentPos_Func)(void *object);
typedef uint32_t (*Mf_GetMatches_Func)(void *object, uint32_t *distances);
typedef void (*Mf_Skip_Func)(void *object, uint32_t);
struct IMatchFinder
{
Mf_Init_Func Init;
Mf_GetIndexByte_Func GetIndexByte;
Mf_GetNumAvailableBytes_Func GetNumAvailableBytes;
Mf_GetPointerToCurrentPos_Func GetPointerToCurrentPos;
Mf_GetMatches_Func GetMatches;
Mf_Skip_Func Skip;
};
void MatchFinder_CreateVTable(struct CMatchFinder *p, struct IMatchFinder *vTable);
void MatchFinder_Init(struct CMatchFinder *p);
uint32_t Bt3Zip_MatchFinder_GetMatches(struct CMatchFinder *p, uint32_t *distances);
uint32_t Hc3Zip_MatchFinder_GetMatches(struct CMatchFinder *p, uint32_t *distances);
void Bt3Zip_MatchFinder_Skip(struct CMatchFinder *p, uint32_t num);
void Hc3Zip_MatchFinder_Skip(struct CMatchFinder *p, uint32_t num);
#endif
|
